These bowls are designed using randomly rotated Truchet tiles. The resulting pattern has the appearance of a bunch of random squiggles covering the surface of the bowl.

See here for video: https://youtu.be/FDVLYQGyryY

There are three sizes of trays, and five unique patterns for each size. See Thangs links below for access to all patterns. Pick your favorite or print out a set of unique pieces. They scale up easily to whatever dimensions you want.

Download the set:
Small: https://than.gs/m/911517
Medium: https://than.gs/m/911519
Large: https://than.gs/m/911520

Matching set of Truchet Trays:
Small: https://than.gs/m/907948
Medium: https://than.gs/m/907950
Large: https://than.gs/m/907952